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January 30, 2015

Posts by SARA


Total # Posts: 3,831

trig
An airplane is flying at an altitude of 31,000 feet when it begins its descent for landing.If the runway is 104 miles away,at what angle does the airplane descend?
April 15, 2012

trig
You measure the angle of elevation from the ground to the top of a building as 32 degrees.When you move 50 meters closer to the building,the angle of elevation is 53 degrees. How high is the building?
April 15, 2012

trig
A submersible traveling at a depth of 250 feet dives at an angle of 15 degrees with respect to a line parallel to the water's surface. It travels a horizontal distance of 1500 feet during the dive. What is the depth of the submersile after the dive?Explain how the angle of...
April 15, 2012

Phys
Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
April 11, 2012

ETHICS
This pisses me off ---- this is only a 300 level class at the university of phoenix which you are paying 1300 to 1600 to take this class and you cant do your own essay.....seriously!
April 10, 2012

biology
thank you, i have seen that site. but it doesnt not explain the steps and process that the brain takes in order to make a person fall sleep
April 9, 2012

biology
What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.
April 9, 2012

english
is giving information(such as mentioning details about something that happened) considered part of ethos?
April 1, 2012

physics--please help
thank you soooo much...the answer is correct..thanks again for working on it for this long
April 1, 2012

physics--please help
yes they hit it at 256.7..i typed it wrong...i am still not getting the correct beat frequency
April 1, 2012

physics--please help
I am sorry..but this is not the right answer either
April 1, 2012

physics--please help
could you help me more with this?
April 1, 2012

physics--please help
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
April 1, 2012

physics--please help
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
April 1, 2012

physics
This doesn't give me the correct answer
March 31, 2012

physics
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
March 31, 2012

physics--please help
how do you find beat frequency?
March 30, 2012

Math
why does 1/(n(n+1)) converges?
March 28, 2012

physics
NEED HELP WITH ONLY PART C Two 135.1.0-W speakers, A and B, are separated by a distance D = 3.6 m. The speakers emit in-phase sound waves at a frequency f = 11800.0 Hz. Point P1 is located at x1= 4.50 m and y1 = 0 m; point P2 is located at x2 = 4.50 m and y2 = –y. a) ...
March 27, 2012

physics--please help
A half-open pipe is constructed to produce a fundamental frequency of 230 Hz when the air temperature is 17 °C. It is used in an overheated building when the temperature is 39 °C. Neglecting thermal expansion in the pipe, what frequency will be heard?
March 26, 2012

algebra
8-t/2=53
March 26, 2012

Physics-Thermo
Imagine a 600 g of water at 70oC in a piston-cylinder device. Initially, the 9-kg, 13-cm diameter piston rests on two stops such that the water occupies a volume of 0.2 m3. Heat is transferred to the system until the water is completely vaporized. Take the atmospheric pressure...
March 26, 2012

thermodynamics
A piston-cylinder device contains 100 g of ethylene gas initially at 27oC, 115 kPa. Ethylene is heated and the piston starts to rise until the volume reaches 90 L and merely touches a linear spring that has a spring constant of 60 kN/m. More heat is added until the piston ...
March 26, 2012

physics
no
March 24, 2012

physics
The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be
March 24, 2012

physics
this gives me the answer for drag force
March 24, 2012

physics
A ball of circumference 71.5 cm and mass 640 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the ball.
March 24, 2012

physics
A child loses his balloon, which rises slowly into the sky. If the balloon is 13 cm in diameter when the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension can be neglected. (a) 2200 m
March 23, 2012

physics
A mass M = 5 kg moves with an initial speed v = 3 on a level frictionless air track. The mass is initially a distance D = 0.250 m away from a spring with k = 844 N/m, which is mounted rigidly at one end of the air track. The mass compresses the spring a maximum distance d, ...
March 23, 2012

chemistry
are compressive strength and brittle the same thing..if not then what is the difference?
March 21, 2012

math
16stickers are placed in a box if one sticker Is drawn from the box which color is it most Likely to be? Key:-1 Red I I I Blue I I I I Yellow I I Green I I I I I I I
March 20, 2012

chemistry
the components in the following glycerolphospholipid are: O || CH2OC(CH2)14CH3 | O | || CHOC(CH2)14CH3 | O | || + CH2OPOCH2CH2NH3
March 20, 2012

chemistry
what is the difference between a nanocomposite and a nanotube?
March 19, 2012

chemistry
please give me an example of a nanocomposite material
March 16, 2012

chemistry 30a
What volume (in mL) of an 8% w/v acetic acid solution would be needed to form 2.2 L of carbon dioxide gas at 25.2 degrees Celsius and 0.9982 atm? Assume the acid is reacted with excess sodium bicarbonate, and round your final answer to two sig figs.
March 12, 2012

math 156Trig Help
2x
March 11, 2012

Physics
ions
March 7, 2012

physics
A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this position? 2 J
March 5, 2012

Physics
A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the potential energy at ...
March 5, 2012

Algebra
in put y=x(10)
March 5, 2012

Math
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9)
February 28, 2012

Geometry
b.20 because 1:3:5 1+3+5=9 180/9=20 20:60:100
February 28, 2012

1 geometry question
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9) i have no clue
February 28, 2012

Finance
Which of the following has more interest risk? Why? A. Bond A with a 10% Coupon and a YTM of 10% which matures in 5 years. B. Bond B with a 10% Coupon and a YTM of 10% which matures in 11 years. C.) A share of Preferred Stock that pays $10 dividend in perpetuity with a ...
February 28, 2012

Finance
A proposed project has expected cash flows of $72,000 per year for 5 years. If the project has an initial cost of $400,000, what is the payback period (in years)?
February 28, 2012

Finance
You recently paid $31.50 for a share of Breaking Benjamin stock. Your required rate of return is 13% and you expect the company to increase dividends at a constant rate or 2.5% for the forseeable future. What was the most recent dividend of Breaking Benjamin?
February 28, 2012

calculus
A 29-ft chain with mass density 3 lb/ft is initially coiled on the ground. How much work is performed in lifting the chain so that it is fully extended (and one end touches the ground).
February 24, 2012

chemistry
How many molecules in 8.221g PbO2?
February 23, 2012

geometry
find the altitude of an equilateral triangle with side length twelve
February 23, 2012

geometry
the base of an isoscels triangle is 4x long. the altitude to the base is 3x cm long. Find the length of one other side of the triangle
February 23, 2012

physics--please help
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? (The distance ...
February 23, 2012

physics
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? The distance between...
February 22, 2012

calculus
find lim x->0 3- sqrt x+9/-x
February 19, 2012

world history
thank you
February 19, 2012

world history
i need a website that proves that because i have to do a bibliography for this section of the senior project
February 19, 2012

world history
training like a student teacher something like that isn't that consider as a training
February 19, 2012

world history
i'm working on my senior project and i need some help i'm supposed to do some researches about my future career, however i couldn't find a website that tells me if a world history teacher needs an additional training or not ?
February 19, 2012

math Statistics
Hi I need help with Statistics. Can anyone help me to understand it better? I am in fear that if I do not figure this out soon I will fail my class. I am needing help with the chapters 12,and 13. in the book called Statistical Reasoning in the Behavioral Sciences, 6th edition...
February 19, 2012

physics--please help
Only need help with part c--answer for part a is 2.94 radians and for b it is 777 days Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be ...
February 18, 2012

physics
Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
February 17, 2012

Government
Cross pressured v?
February 17, 2012

last Government
These voters are caught between conflicting issues. young voters independent voters strong party voters cross-pressured voters
February 17, 2012

Government
When party loyalists select the candidates of their party, they vote a propaganda ticket. straight-party ticket. cross-pressured vote. landslide.
February 17, 2012

Physics to drwl please help
Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
February 16, 2012

Math
18th
February 16, 2012

physics
I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
February 16, 2012

physics
I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
February 16, 2012

physics
thanks
February 15, 2012

physics
not the right answer
February 15, 2012

physics
A particle is moving clockwise in a circle of radius 1.54 m. At a certain instant, the magnitude of its acceleration is a = 26.0 m/s2,and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this instant, find the speed...
February 15, 2012

physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
February 15, 2012

physical science
5/17=0.294 N
February 15, 2012

physics
it is d
February 15, 2012

physics
for L, are you using the answer from part a?? when i use that i get around 14 degrees
February 15, 2012

physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
February 15, 2012

English 5 questions
1. During this time period, writers sought to capture the _____________ of the American people during this era of a new postwar economy and society. peace anger anxiety all of the above 2. Like the modernists, postmodern writers focused on _____________ experience and ...
February 15, 2012

physics
thanks
February 15, 2012

physics
A man with a mass of 50 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
February 15, 2012

1 chem question
A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic. (do explain. i dont understand this one)
February 14, 2012

physics
A man with a mass of 52 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
February 14, 2012

Physics
Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
February 14, 2012

Physics
Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
February 13, 2012

Chem
Which of these solutions is the most basic? [H+] = 1 x 10–2 M [OH–] = 1 x 10–4 M [H+] = 1 x 10–11 M [OH–] = 1 x 10–13M i think its the first one?
February 13, 2012

Chemistry
I just wanted to say i found this question and if helped me so much with my homework! thank you so much DrBob222!!
February 13, 2012

Algebra
Find the square roots of 25
February 11, 2012

Chem
Which of the following statements is part of the kinetic theory? The particles of a gas move independently of each other. The particles in a gas move rapidly. The particles in a gas are relatively far apart. all of the above
February 10, 2012

physics
convert 52 g to kg and then 218 divided by that number
February 10, 2012

physics
I did that but i am not getting the right answer
February 10, 2012

physics
Betty Bodycheck (mB = 50.2 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
February 10, 2012

physics
The question is what are their final kinetic energy?
February 10, 2012

physics
Betty Bodycheck (mB = 50 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
February 10, 2012

physics
This means that for every action, there is an equal and opposite reaction
February 10, 2012

math
454.86
February 9, 2012

physics
A billiard ball of mass 0.16 kg has a speed of 1.80 m/s and collides with the side of the billiard table at an angle of 34.6°. For this collision, the coefficient of restitution is 0.841. What is the angle relative to the side (in degrees) at which the ball moves away from...
February 9, 2012

Psychology
As a consumer of mental health services, which type of therapy would you prefer if you did not like to talk about your problems? If you were suffering from a phobia? If you had recurring nightmares since childhood? If you wanted to improve your marriage?
February 9, 2012

trig
if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
February 8, 2012

Geometry
What is the measures of the angles of a triangle that are in the extended ratio 2:2:8. What is the measure of the smallest angle?
February 8, 2012

poetry
what is the genre of the poem: tonight i can write by pablo neruda?
February 6, 2012

English
faith that he will one day be affirmed by white America. ???
February 6, 2012

English
The speaker in “I, Too, Sing America” survives adversity because he feels faith that he will one day be affirmed by white America. he has uncovered the hypocrisy around him. he is better than the people who are oppressing him. hope that he can one day run away from ...
February 6, 2012

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